Macrostrat Lexicon

This is the homepage of Macrostrat's geological lexicons, which are assembled from many data sources including Canada's WebLex, the USGS's Geolex, and other sources. The lexicon is continually updated in partnership with researchers and data providers.

Lithologies

A tree-based representation of lithologies

Stratigraphic names

Sift, Macrostrat's legacy lexicon app, is still available for use as it is gradually brought into this new framework.